US7724147B2 - Medical notification apparatus and method - Google Patents

Medical notification apparatus and method Download PDF

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Publication number
US7724147B2
US7724147B2 US11/485,932 US48593206A US7724147B2 US 7724147 B2 US7724147 B2 US 7724147B2 US 48593206 A US48593206 A US 48593206A US 7724147 B2 US7724147 B2 US 7724147B2
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signal
message
processing unit
identification
acoustic
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US11/485,932
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US20080018435A1 (en
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Houston Brown
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CareFusion 303 Inc
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Cardinal Health 303 Inc
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Assigned to CARDINAL HEALTH 303, INC. reassignment CARDINAL HEALTH 303, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BROWN, HOUSTON
Priority to US11/485,932 priority Critical patent/US7724147B2/en
Priority to RU2009104956/08A priority patent/RU2469407C2/ru
Priority to BRPI0714217A priority patent/BRPI0714217B1/pt
Priority to NZ574143A priority patent/NZ574143A/en
Priority to CN201410773987.0A priority patent/CN104573323A/zh
Priority to JP2009519702A priority patent/JP2009543613A/ja
Priority to CA2657149A priority patent/CA2657149C/en
Priority to CNA2007800279802A priority patent/CN101496016A/zh
Priority to EP07799547.0A priority patent/EP2050033B1/en
Priority to PCT/US2007/073396 priority patent/WO2008008916A2/en
Priority to AU2007272445A priority patent/AU2007272445C1/en
Publication of US20080018435A1 publication Critical patent/US20080018435A1/en
Priority to NO20090303A priority patent/NO20090303L/no
Priority to ZA2009/00901A priority patent/ZA200900901B/en
Assigned to CAREFUSION 303, INC. reassignment CAREFUSION 303, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: CARDINAL HEALTH 303, INC.
Assigned to CAREFUSION 303, INC. reassignment CAREFUSION 303, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: CARDINAL HEALTH 303, INC.
Publication of US7724147B2 publication Critical patent/US7724147B2/en
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Priority to RU2012124891/08A priority patent/RU2012124891A/ru
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    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
    • G16H40/20—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the management or administration of healthcare resources or facilities, e.g. managing hospital staff or surgery rooms
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
    • G16H40/60—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices
    • G16H40/63—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for local operation

Definitions

  • the invention relates generally to a medical notification apparatus and method and, more particularly, to automatically providing a notification to a preexisting healthcare facility call system upon detection of the existence of a particular medical event signal.
  • certain patient monitoring devices and treatment devices provide acoustic signals indicative of status. Some of those signals can relate to a patient condition or can relate to a medical device condition for which a clinician should be called or alerted as soon as possible. Other acoustic signals are of lesser importance and should not be the basis for interrupting a clinician in the performance of other tasks. Additionally, there may be other acoustic signals generated in a patient hospital room that are completely unrelated to patient care and for which no clinician attention should be given.
  • patient visitors may bring mobile telephones that emit unusual acoustic sounds or signals, or visitors may have other electronic devices, such as portable computers, that emit acoustic signals, none of which should form the basis for alerting the healthcare staff.
  • Televisions, radios, and intercoms in patient rooms may also emit sounds which should be distinguished from acoustic signals from medical devices.
  • An example of a medical device acoustic signal is that given by an infusion pump when the tubing of the medication administration set becomes occluded downstream of the pump so that the infusion of medical fluid to the patient is interrupted.
  • Most infusion pumps will provide an acoustic signal that will communicate to a clinician that there is a problem with the infusion.
  • These acoustic signals can be quite loud and are meant to attract attention.
  • there are times when the person charged with supervising the medical device is not close enough to the medical device to hear the acoustic alarm signal. Making the acoustic alarm signal louder so that it may be heard from a greater distance is undesirable since it would disturb patients in other rooms.
  • some medical devices were configured to communicate directly, via wired or wireless means, to a preexisting healthcare facility communications network or “nurse call” system.
  • wires may be cumbersome and present a hazard, especially when the medical device is located at a significant distance from a nurse call communications port.
  • Wires are also inconvenient because they must disconnected when the medical device is moved out of a patient's room.
  • wires are undesirable because they may inadvertently remain disconnected when the medical device is returned to the room.
  • Many facilities do not include a wireless nurse call system and when they do, in some cases the wireless communications protocol may differ from that of the medical device thereby preventing an operable connection.
  • a medical device designed to operate with a particular nurse call system of a healthcare facility must incorporate communications hardware and software which make the device more expensive.
  • a healthcare institution may be unwilling to replace older medical devices with newer, more expensive devices that incorporate such necessary communications hardware and software. The increased expense may be prohibitive especially when multiplied by tens or hundreds of medical devices in a healthcare facility.
  • typical nurse call systems in healthcare facilities often include a panel 100 on the wall of a patient's room 102 .
  • the panel is often located near the patient's bed and typically comprises a jack or connector 104 of some type that accepts a plug 106 with a long cable 108 terminating in a nurse call button or switch 110 at the patient's bedside.
  • the patient 112 manually actuates the nurse call button whenever the patient needs assistance from a clinician 114 who may be located at a remote clinician station 116 .
  • the patient may also actuate the nurse call button whenever a medical device 118 in the patient's room generates an acoustic alarm to alert the clinician of the alarm.
  • the clinician can determine from which room the signal originated because the rooms are individually displayed at, typically, the clinician workstation 117 in the clinician station.
  • the clinician workstation 117 can also have an acoustic alarm in combination with a visual indicator that alert a clinician that a nurse call has been initiated.
  • More sophisticated workstations are capable of being programmed to contact a nurse-in-charge who has a portable communication device.
  • Portable communication devices include, without limitation, pagers, personal digital assistants (“PDAs”), and mobile telephones.
  • PDAs personal digital assistants
  • Some healthcare facilities include an Ethernet network system to which the nurse call system is connected. Such nurse call systems can send text or other coded messages to the clinician.
  • clinicians are not always present in the same room as a patient and the medical devices connected to the patient.
  • a medical device emitting an acoustic alarm that is not heard and responded to by a clinician for any period of time may cause anxiety in patients.
  • a medical notification apparatus comprises an acoustic sensor configured to generate a sensor signal in response to an acoustic alarm indicative of a medical device parameter; a signal processing unit in communication with the acoustic sensor and configured to generate an identification signal when the sensor signal from the acoustic sensor satisfies an identification criterion; and an interface unit in communication with the signal processing unit and configured to send a message signal to a healthcare facility call system in response to the identification signal from the signal processing unit.
  • the signal processing unit comprises a signal conditioner having an automatic level adjuster, the signal conditioner adapted to smooth the sensor signal.
  • the signal processing unit comprises a band pass filter.
  • the signal processing unit comprises a timing gate.
  • the signal processing unit comprises an active filter.
  • the signal processing unit comprises a processor adapted to execute a fast Fourier transform routine to analyze the sensor signal.
  • the identification criterion comprises a frequency band.
  • the identification criterion comprises a pulse pattern.
  • the interface unit comprises a switch configured to produce a contact closure in response to the identification signal from the signal processing unit.
  • the interface unit comprises a radio frequency transmitter configured to transmit a radio frequency signal to the healthcare facility call system in response to the identification signal from the signal processing unit.
  • the interface unit comprises a radio frequency transmitter and is configured to transmit a radio frequency signal to a portable communications device in response to the identification from the signal processing unit.
  • the interface unit comprises an Ethernet driver and is configured to transmit an electronic message to the healthcare facility call system in response to the identification signal from the signal processing unit.
  • the medical notification apparatus comprises a memory unit associated with the signal processing unit, the memory unit storing the identification criterion.
  • the medical notification apparatus comprises a memory unit associated with the interface unit, the memory unit storing a set of message signals, each one of the set of message signals associated with a different medical device alarm; and wherein the message signal sent to the healthcare facility call system is selected from among the stored set of message signals.
  • a medical notification apparatus for use with a healthcare facility call system, the medical notification apparatus comprises an acoustic sensor configured to generate a sensor signal representative of an acoustic alarm received by the acoustic sensor, the acoustic alarm associated with a medical device parameter; a signal processing unit connected to the acoustic sensor and configured to store an identification criterion and to determine whether the sensor signal from the acoustic sensor satisfies the stored identification criterion; and an interface unit connected to the signal processing unit and configured to send a message signal to the healthcare facility call system when the sensor signal from the signal processing unit satisfies the stored identification criterion.
  • a method of providing medical notification comprises sensing an acoustic alarm indicative of a medical device parameter; and sending a message signal from a medical notification apparatus to a healthcare facility call system in response to the medical notification apparatus identifying the acoustic alarm.
  • sending the message from the medical notification apparatus comprises determining whether the acoustic alarm satisfies an identification criterion, and generating the message signal when the acoustic alarm satisfies the identification criterion.
  • sending the message from the medical notification apparatus comprises determining whether the acoustic alarm satisfies an identification criterion from among a set of identification criteria, and generating the message signal from among a set of message signals when the acoustic alarm satisfies the identification criterion, each one of the set of message signals associated with one of the set of identification criteria.
  • the method further comprises wirelessly transmitting a signal to a portable communications device in response to the acoustic alarm satisfying an identification criterion.
  • FIG. 1 provides a perspective view of a typical healthcare facility call system showing a nurse call panel mounted near a patient's bed, a nurse call button and cable connected with the nurse call panel with the button being located within reach of the patient, an alarming infusion pump adjacent the patient, and a clinician station to which the nurse call system is connected that informs the clinician at the station that a patient is pressing a nurse call button and desires assistance;
  • FIG. 2 is a block diagram of a medical notification apparatus in accordance with an embodiment of the present invention showing an acoustic sensor for generating a sensor signal in response to an acoustic alarm from a medical device, a signal processing unit comprising an automatic level adjuster, a band pass filter, and a timing gate for generating an identification signal, and an interface unit comprising a switch for sending a message signal to a healthcare facility call system in response to the identification signal;
  • FIG. 3 is a perspective diagram of the nurse call panel similar to that of FIG. 1 at which may be mounted a medical notification apparatus in accordance with aspects of the invention, the medical notification apparatus having a microphone and signal processing equipment with a housing and having a plug for engaging a jack at which the nurse call cable and switch for the patient is usually mounted, the medical notification apparatus also having in this embodiment a power cord and a plug for connection to a main power source at the panel for powering the medical notification apparatus;
  • FIG. 4 is a block diagram of a medical notification apparatus in accordance with another embodiment showing an acoustic sensor for sensing an acoustic alarm from a number of medical devices, a signal processing unit comprising an automatic level adjuster and a processor for determining whether the acoustic alarm satisfies an identification criterion stored in a memory unit, a data transfer port for programming, and an interface unit for sending a message signal to a healthcare facility call system;
  • FIG. 5 is a block diagram of a medical notification apparatus in accordance with yet another embodiment showing an acoustic sensor for sensing an acoustic alarm from a number of medical devices, a signal processing unit, an interface unit comprising an Ethernet driver for sending a message signal associated with the sensed acoustic alarm and selected from among a set of message signals stored in a memory unit;
  • FIG. 6 is a block diagram of another medical notification apparatus showing an acoustic sensor for sensing an acoustic alarm from a number of medical devices, a signal processing unit, an interface unit comprising a pager transmitter for sending a message signal associated with the sensed acoustic alarm to one or more pagers associated with pager identification codes stored in a module of the apparatus; and
  • FIG. 7 is a flow diagram of a method in accordance with aspects of the invention for providing a medical notification showing sensing an acoustic alarm and generating a message signal to be sent to a healthcare facility call system when the acoustic alarm satisfies an identification criterion.
  • FIG. 1 a perspective view of a typical nurse call system presently existing in many healthcare facilities.
  • the nurse call system referred to more generally as a healthcare facility call system 22 , includes a nurse call panel 100 located in this embodiment on a wall of a patient's room 102 having a communications port or jack 104 to which is connected a cooperatively shaped plug 106 on a cable 108 connected to a hand-held nurse call button 110 .
  • the nurse call button is manually actuated by a patient 112 in order to call a clinician 114 who may be located at a clinician station 116 located outside of the patient's room. Actuation of the nurse call button results in an alarm indication at the clinician workstation 117 .
  • the patient may call the clinician when a medical device 118 , such as an infusion pump, located in the patient's room emits an acoustic alarm or when the patient desires assistance.
  • a medical device 118 such as an infusion pump, located in the patient's room emits an acoustic alarm or when the patient desires assistance.
  • AC power outlets or sockets 120 are located on the nurse call panel for convenience in providing power to medical devices, lights, and other electrical appliances in the vicinity of the patient.
  • FIG. 2 there is shown a block diagram of a medical notification apparatus 20 in communication with a preexisting healthcare facility call system 22 , such as a nurse call system in a hospital shown in FIG. 1 .
  • the medical notification apparatus 20 is adapted to send, via wired or wireless means, a message signal 24 to the healthcare facility call system in response to an identified acoustic alarm 26 from a medical device 28 .
  • medical device refers to a device used to provide medical care to a patient, including but not limited to passive devices, such as pulse oximeters and other patient monitors, and active devices, such as ventilators, infusion pumps, and other medication delivery devices.
  • the acoustic alarm is generated automatically, that is without active input from a patient or other person, by the medical device as an indication of a parameter of the medical device.
  • the parameter of the medical device may relate to patient condition, the operational status of the medical device, or other variable condition.
  • a pulse oximeter may produce an acoustic alarm to indicate that a parameter representative of the patient's blood oxygen saturation level is at a certain level or when another parameter representative of the patient's pulse rate is at a certain level.
  • the person being notified may be located remotely and need not hear the acoustic alarm to be informed of a parameter of the medical device.
  • the medical notification apparatus 20 comprises an acoustic sensor 30 , such as a microphone, that produces a signal in response to sound.
  • the acoustic sensor generates an electrical sensor signal 32 representative of the sound of the acoustic alarm signal 26 .
  • the acoustic sensor and other elements of the medical notification apparatus obtain power from a power source 31 coupled to a preexisting AC power outlet (not shown on the wall of the healthcare facility.
  • the power source may also be coupled to a battery (not shown), including but not limited to standard D size load cells, that is part of the medical notification apparatus to allow operation of the medical notification apparatus in cases where there is no nearby AC power outlet or in the event of a power failure in the healthcare facility.
  • the medical notification apparatus 20 further comprises a signal processing unit 34 in communication with the acoustic sensor 30 .
  • the signal processing unit is configured to generate an identification signal 36 when the sensor signal 32 from the acoustic sensor satisfies a predetermined identification criterion.
  • the signal processing unit comprises a signal conditioner having an automatic level adjuster 38 for “smoothing” or modifying the amplitude or other characteristic of the sensor signal 32 to produce a conditioned sensor signal 44 . Smoothing may be used to reduce the effects of background noise.
  • the degree or level of modification is a matter of choice and may depend in part on the output characteristics of the acoustic sensor and the manner of signal processing to be performed.
  • the identification criterion, a predetermined frequency band and a pulse rate in this case, are determined with the selection of the characteristics of the band pass filter 40 and the timing gate 42 .
  • the characteristics of the band pass filter and the timing gate are carefully selected so that an identification signal is produced in response to only the acoustic alarms for which a notification through the healthcare facility call system 22 is desired.
  • the characteristics of the band pass filter and the timing gate may be selected so that audible tones from a television and arising from normal operation of a medical device do not result in a notification through the healthcare facility call system.
  • the manner of signal processing involves a band pass filter 40 and a timing gate 42 , both within the signal processing unit 34 .
  • the band pass filter is adapted to process the conditioned sensor signal 44 to allow only a predetermined frequency band to pass. If the conditioned sensor signal 44 comprises frequencies within the predetermined frequency band, a filtered sensor signal 46 is produced.
  • the timing gate is used to authenticate the acoustic alarm as matching a predetermined pulse rate or pattern.
  • the signal processing unit generates the identification signal 36 when the acoustic alarm has a frequency within the predetermined frequency band and matches a predetermined pulse rate or pattern. In this case, the identification signal 36 may simply be the signal that passes through the timing gate 42 .
  • the medical notification apparatus 20 further comprises an interface unit 48 in communication with the signal processing unit 34 .
  • the interface unit is configured to send the message signal 24 to the healthcare facility call system 22 in response to the identification signal 36 from the signal processing unit.
  • the interface unit 48 comprises a switch 50 that produces a contact closure, similar to when a nurse call button is manually actuated by a patient, when an identification signal is generated.
  • the contact closure produces the message signal that is sent to the healthcare facility call system 22 ( FIG. 1 ), triggering notification of a nurse or other person that an acoustic alarm was identified.
  • the interface unit 48 may also produce a message signal 24 that comprises a series of momentary contact closures of the switch 50 .
  • the duration of the contact closure or the time between the start of the contact closures correspond to a unique code recognized or decoded by the healthcare facility call system 22 ( FIG. 1 ).
  • the type of acoustic alarm 26 may be differentiated by the healthcare facility call system. For example, an infusion acoustic alarm from an infusion pump may result in a message signal having one short and two long contact periods.
  • the healthcare facility call system upon recognizing this message signal, indicates to the appropriate clinician that an infusion acoustic alarm is sounding.
  • a vital sign acoustic alarm from a patient monitoring device may have a different acoustic signature than the infusion acoustic alarm so as to result in different message signal having two short and one long contact periods.
  • the healthcare facility call system upon recognizing this different message signal, indicates to the appropriate clinician that a vital sign acoustic alarm is sounding.
  • other codes including but not limited to Morse code, may be used to differentiate types of alarms.
  • the medical notification apparatus 20 has a protective cover or housing 52 with openings 54 to allow sound to reach the acoustic sensor 30 inside the housing.
  • the housing also contains the interface unit 48 ( FIG. 2 ), which preferably comprises a communications plug 56 adapted to connect to a cooperatively shaped jack, such as a standard input jack 104 on a nurse call panel 100 on the wall of a patient's room.
  • the communications plug serves as a communications link and as a means of temporarily securing the medical notification apparatus to the preexisting nurse call panel.
  • a power cord 57 with a power plug 58 extends from the power source 31 ( FIG. 2 ) inside the housing and is connected to an AC power outlet 120 on the nurse call panel 100 .
  • the medication notification apparatus may be rapidly installed in and removed from a patient's room whenever desired.
  • the medical notification apparatus 20 may be powered alternatively.
  • battery power may be used, or power may be provided through the plug 56 , or otherwise.
  • the housing may be mounted to the nurse call panel in other ways, or mounted adjacent the nurse call panel.
  • means may be provided for continuing use of the standard patient's button and cable 108 and 110 .
  • the housing 52 may be provided with a jack for receipt of the patient's cable plug 106 and the medical notification apparatus may recognize a patient signal and pass it through.
  • other means may also be used.
  • a signal processing unit 34 in another exemplary embodiment of the present invention comprises an automatic level adjuster 38 and a processor 60 .
  • the characteristics of the automatic level adjuster are carefully selected based in part on the output characteristics of the acoustic sensor 30 and the input requirements of the processor.
  • the processor is a digital microprocessor and is configured to perform active filtering and to execute a Fast Fourier Transform (“FFT”) routine to analyze the conditioned sensor signal 44 .
  • the FFT routine comprises determining whether the sensed acoustic alarm 26 , represented by the conditioned sensor signal, satisfies an identification criterion or a set of rules 62 .
  • the identification criterion 62 may, without limitation, include a predetermined frequency band and a predetermined pulse pattern or rate.
  • an identification signal 36 is generated by the signal processing unit.
  • a switch 50 in the interface unit 48 produces a contact closure.
  • the contact closure forms a message signal 24 that is sent to the healthcare facility call system 22 ( FIG. 1 ), triggering notification of a nurse or other person that an acoustic alarm was identified in a particular patient's room.
  • the message signal 24 from the interface unit 48 of FIG. 4 may be a single contact closure.
  • the message signal may be a string or series of momentary contact closures producing a closure pattern that would be decoded by the healthcare facility call system 22 , as previously described in connection with FIG. 3 .
  • the processor 60 executes a signal processing program that is stored in an associated memory unit 64 that includes one or more identification criteria 62 .
  • the memory unit comprises one or more devices for storing data.
  • the memory unit comprises a flash memory device.
  • the memory unit may comprise other forms of Electrically-Erasable Programmable Read-Only Memory (EEPROM) or other types of Non-Volatile Read Write Memory.
  • EEPROM Electrically-Erasable Programmable Read-Only Memory
  • the memory unit allows the medical notification apparatus 20 to be rapidly programmed by a technician of the healthcare facility to send a message signal 24 in response to a variety of acoustic alarms 26 from one or more medical devices used by the facility.
  • the medical notification apparatus may be rapidly reprogrammed if necessary whenever a new medical device is introduced. Reprogramming may be performed by uploading new identification criteria to the memory unit via a data transfer port 65 of the medical notification apparatus 20 .
  • a medical notification apparatus 20 of another embodiment of the present invention is configured to send a different message signal 24 with each type of acoustic alarm 26 identified by the signal processing unit 34 .
  • different message signals could be sent to the healthcare facility call system 22 ( FIG. 1 ) in response to a near-end-of-infusion alarm and an occlusion alarm often available from infusion pump devices. Both types of alarms indicate the infusion pump's operational status but require different action from the person being notified.
  • the person that is notified is able to take the appropriate action without first entering the patient's room to determine the nature of the notification.
  • a memory unit 66 is associated with the interface unit 48 and is adapted to store a set of message signals 68 .
  • This memory unit 66 comprises one or more devices for storing data, which may be shared in common with the memory unit 64 ( FIG. 4 ) associated with the signal processing unit 34 .
  • Each one of the set of message signals is associated with a different acoustic alarm. As such, when an acoustic alarm 26 is identified by the signal processing unit 34 , the interface unit sends a message signal 24 associated with the identified acoustic alarm from among the stored set of message signals.
  • the interface unit 48 of this embodiment comprises an Ethernet driver 69 and communications plug (not shown) adapted to connect to a cooperatively shaped communications port 104 , such as an Ethernet port on a nurse call panel 100 on the wall of a patient's room.
  • the Ethernet driver implements an Ethernet communication protocol to send the message signal 24 associated with the identified acoustic alarm 26 .
  • FIG. 6 there is shown another exemplary embodiment of a medication notification apparatus 20 that is configured to actuate or send a message to one or more pagers 82 or other portable communication devices carried or worn by healthcare personnel.
  • the interface unit 48 includes a pager transmitter 84 .
  • the interface unit receives an identification signal 36 , it accesses a module 86 containing one or more pager identification codes 88 , then transmits a message signal 24 in the form of a radio frequency signal via the pager transmitter to one or more pagers associated with the accessed pager identification codes.
  • the medication notification apparatus is matched to one or more pagers, which when actuated, produces a vibratory or auditory signal when an acoustic alarm 26 is sensed and identified by the apparatus 20 .
  • the pagers may also display an alphanumeric message that may indicate the location of the medication notification apparatus 20 . Further, the content of the displayed alphanumeric message may vary depending on the type of acoustic alarm, thereby allowing healthcare personnel that are notified to take appropriate action without first entering the patient's room to determine the nature of the notification.
  • the means of connecting to and communicating with the healthcare facility call system 22 is a matter of choice that depends on the requirements of the healthcare facility call system.
  • the medical notification apparatus 20 may be configured to adapt or retrofit to other types of communication networks and protocols, such as 802.11 Wireless Fidelity (“WiFi”).
  • WiFi 802.11 Wireless Fidelity
  • the interface unit 48 comprises a radio frequency transmitter (not shown) for sending the associated message signal 24 to the healthcare facility call system.
  • More sophisticated medical devices can be programmed to embed different sonic patterns within an acoustic alarm to further differentiate the alarms.
  • the embedded sonic patterns may be hidden in the sense that they are outside the normal range of human hearing.
  • the embedded sonic patterns may have a sound wave frequency that is too high (for example, above about 20,000 Hz) or too low (for example, below about 20 Hz) for humans to hear.
  • information sent to the health care facility call system 22 can include more than just the type of alarm or medical device that requires attention. For example, there may be two patients in the same room, both patients connected to separate infusion pumps of the same model.
  • Each of the infusion pumps may be adapted to embed different sonic patterns that uniquely identify the pump.
  • the medical notification apparatus in the two patients' room may send a message, via wireless or wired means, to the healthcare facility call system uniquely identifying the infusion pump requiring attention.
  • medical devices are uniquely identified with embedded sonic patterns, there is no need for the each of the medical devices to be enabled for radio frequency communication with a wireless hospital information system for the sole purpose of uniquely identifying the pump requiring attention.
  • FIG. 7 a flow diagram of a method of providing medical notification in accordance with the present invention. Although the method will be described in connection with the medical notification apparatus of FIGS. 2-5 , it will be appreciated that other medical notification apparatus may be used to implement the method.
  • an acoustic alarm indicative of a medical device parameter is sensed 70 .
  • the acoustic alarm may be sensed with a microphone or other type of acoustic sensor.
  • An identification criterion is established 72 .
  • the identification criterion may be established by the inherent or selected characteristics of devices, such as a band pass filters and a timing gate, of the signal processing unit.
  • the identification criterion can also be established by accessing a memory unit storing a set of identification criteria.
  • a determination 74 is made as to whether the sensed acoustic alarm satisfies the identification criterion. This determination can occur when a sensor signal from an acoustic sensor passes through a band pass filter and a timing gate to produce an identification signal. This determination can performed by a flash programmable processor configured to execute of an FFT routine.
  • another identification criterion is established 72 if it is determined 76 that another identification criterion is stored in a memory unit. If no other identification criterion is stored in a memory unit, no further steps are performed.
  • a message signal is generated 78 .
  • a message signal may be generated by contact closure of a switch.
  • the message signal can also be generated by selecting a message signal associated with the sensed acoustic alarm from among a set of set of message signals stored in a memory unit. After the message signal is generated, it is sent 80 to a healthcare facility call system.
  • the present invention provides a medication notification system that may be implemented in an existing nurse call system. Medical devices need not be replaced and only one medical notification apparatus is needed in a room having many medical devices.
  • the present invention is also easily implemented in that the medical notification apparatus does not need to be connected with wires to the medical devices and it may be installed rapidly by simply plugging it into a preexisting health facility call system.

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  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
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US11/485,932 2006-07-13 2006-07-13 Medical notification apparatus and method Active US7724147B2 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
US11/485,932 US7724147B2 (en) 2006-07-13 2006-07-13 Medical notification apparatus and method
EP07799547.0A EP2050033B1 (en) 2006-07-13 2007-07-12 Medical notification apparatus and method
AU2007272445A AU2007272445C1 (en) 2006-07-13 2007-07-12 Medical notification apparatus and method
NZ574143A NZ574143A (en) 2006-07-13 2007-07-12 Medical notification apparatus and method
CN201410773987.0A CN104573323A (zh) 2006-07-13 2007-07-12 医疗通知装置与方法
JP2009519702A JP2009543613A (ja) 2006-07-13 2007-07-12 医療通報装置および方法
CA2657149A CA2657149C (en) 2006-07-13 2007-07-12 Medical notification apparatus and method
CNA2007800279802A CN101496016A (zh) 2006-07-13 2007-07-12 医疗通知装置与方法
RU2009104956/08A RU2469407C2 (ru) 2006-07-13 2007-07-12 Устройство и способ медицинского уведомления
PCT/US2007/073396 WO2008008916A2 (en) 2006-07-13 2007-07-12 Medical notification apparatus and method
BRPI0714217A BRPI0714217B1 (pt) 2006-07-13 2007-07-12 aparelho de notificação médica e método de prover notificação médica
NO20090303A NO20090303L (no) 2006-07-13 2009-01-20 Medisinsk varslingsapparat og fremgangsmate
ZA2009/00901A ZA200900901B (en) 2006-07-13 2009-02-06 Medical notification apparatus and method
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CA2657149C (en) 2019-06-04
AU2007272445A1 (en) 2008-01-17
BRPI0714217A2 (pt) 2013-01-29
RU2469407C2 (ru) 2012-12-10
RU2012124891A (ru) 2013-12-20
EP2050033A2 (en) 2009-04-22
CN104573323A (zh) 2015-04-29
CA2657149A1 (en) 2008-01-17
CN101496016A (zh) 2009-07-29
US20080018435A1 (en) 2008-01-24
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